Atlas Copco Exploration Products Surface drilling rig

Atlas Copco Exploration Products

Surface drilling rig

Explorac R50 on crawler

It is a robust and reliable drill unit, making it ideal for remote
areas.

It is designed to perform an outstanding base platform for
“down-the-hole” percussion drilling.

Features »»Top head rotation

»»Safe Working Environment • The heavy duty top head has been designed to
provide drilling speed and torque characteristics for
• It is designed to perform an outstanding base plat- ”down-the-hole” hammer technique and light rotary
form for ”down-the-hole” percussion drilling. Separate drilling. The rotation head is a single reduction oil
drill rig subframe design permits stable mounting on bath gear box, ratio 3,89:1, equipped with two hy-
various standard carriers as well as special vehicles. draulic motors type OMT 250 as standard. The motors
have maximum torque at near stall conditions.
»»Different applications

• It can be equipped for mineral exploration drilling
using the reverse circulation method as well as for
water well drilling.

»»Power pack

• A deck mounted 4-cylinder engine is used as prime
mover for the hydraulic system. The model BF4L914
is a naturally aspirated, four cycle, direct injected,
turbo charged, air-cooled diesel engine, for powering
the hydraulic pumps.

Quick reference

Explorac range Unit ready to drill crawler mounted, external compressor
Explorac R50 C Unit ready to drill truck mounted with onboard mudpump and external compressor
Explorac R50 T

Specifications

Mast Air system and lubricator

• Mast overall length .....................................................6 200 mm • A complete 50 mm (2 in) air system for 25 bar (360 psi) pres-
• Feed travel length.........................................................4 400 mm sure is mounted on the rig. There is also a pressure regulator
• Max distance between floating sub and break-out table connected to a branch line reducing maximum outlet pressure to
......................................................................................4 200 mm 7 bar (100 psi) for simultaneously running of optional pneumatic
• Drill pipe std length.....................................................3 000 mm equipment when high pressure is used for the drilling operation.
The outriggers, mast tilt and slide are operated from a sepa- • An in-line lubricator is mounted in the air line for lubricating
rate valve block located on the right hand side of the rig. percussion tools. An oil tank with 10 lit capacity is included as
• Outriggers, Bore ..............................................................80 mm well.
• Piston rod..........................................................................50 mm • Use only lubrication oil recommended by tool manufacturer.
• Stroke..............................................................................900 mm • Check that oil actually reaches the hammer before drilling
• Tilt cylinder, Bore...........................................................100 mm starts.
• Piston rod..........................................................................50 mm
• Stroke..............................................................................600 mm Control panel
• Slide cylinder, Bore...........................................................80 mm
• Piston rod..........................................................................40 mm Following controls and instruments are mounted in the con-
• Stroke .............................................................................800 mm trol panel

Feed system • Slow and rapid feed control including press. gauges
• Rotation control and press. gauge
The feed system is activated by one hydraulic traverse cylin- • Rotation speed control
der mounted inside the mast. The force is transmitted to the • Feed and hold back press.
top head by a heavy duty chain. • Winch control
• Valves, air press. gauge, main air valve, rpm counter, panel
• Feed cylinder stroke ....................................................2 200 mm light and emergency stop
• Piston Ø ..........................................................................100 mm • Controls for optional equipment are also installed in the panel
• Piston rod Ø ..................................................................63,5 mm
• Feed force (theor.) .......................................................... 48,8 kN Work light / electrical system
• Pull down speed, slow ...............................................16,8 m/min
• Pull down speed, rapid ..............................................48,2 m/min The 24V electric system is connected to the separate diesel
• Pull up capacity (theor.) ................................................. 80,9 kN engine. Circuits are protected by fuses.
• Pull up speed, slow ...................................................10,2 m/min
• Pull up speed, rapid ...................................................29,1 m/min • Alternator .......................................................... 27A, 28V
• Lights
Rotation unit (Top head) • mast ................................................. 2 x 100W floodlights
• control panel ......................................2 x 5W panel lights
Main shaft Alloy steel with 50 mm through hole • work area ..........................................1 x 100W floodlight
• Rotation input power......................................................... 38 kW • work area ............................................1 x 24W floodlight
• Torque max. at 210 bar with standard two motors....... 5 750 Nm
• Speed range for standard motors.................................0 – 97 rpm Crawler
• Floating spindle............................................................................
Direct flanged to gear box with3 ½” reg box thread. The rig unit is mounted on a not oscillating crawler chassi
with hydraulically driven axial piston type motors.
Winch
• Hyd. motor displacement ................................................. 32 cm3
• Pull capacity, empty drum.................................................. 17 kN • Reduction gear ratio ...................................................... 115,5 : 1
• Rope speed, empty drum............................................18,6 m/min • Speed on level ground ..............................................2,4 km/hour
• Wire rope supplied..............................................30 m, Ø 10 mm • This option adds appr. .................................................. 2 790 kg.

Technical specification Explorac R50 Crawler

Specifications

Power pack Rotation motor alternatives

A deck mounted turbo charged 4-cylinder Deutz engine is • The standard rotation unit is equipped with dual hydraulic
motors as per alternative 7 below. By selecting different size of
used as prime mover for the hydraulic system. motors, different torque and rpm options will be available. There
• Model ................................................................ Deutz BF4L914 is a choice of using a single motor or dual motors with a selector
• Number of cylinders ................................................................. 4 valve. Below table illustrates the different options.
• Power .........................................................69 kW at 2300 r/min
• Torque ......................................................355 Nm at 1600 r/min Dual motor Motor type RPM Torque kpm serie
• Displacement ...................................................................4,3 dm3 Alt 1 OMT Nm 190 parallel
• Fuel consumption .......... 225g/kWh at max torque, 12,7 lit/hour 160 0-148 1860 380 serie
• Fuel tank volume .................................................................90 lit Alt 2 0-75 3725 236 parallel
• Air cleaner .....Dry heavy duty with replaceable main and safety 200 0-120 2310 472 serie
elements with dust load indicator. Alt 3 0-60 4630 293 parallel
• Engine safety................................................................................ 250 0-97 2870 586 serie
Low oil pressure, high oil temperature and V-belt failure. Alt 4 0-46 5750 380 parallel
• Installation includes..................................................................... 315 0-74 3725 762
24 V electrical system, fuel filters, lube oil filter, instruments 0-37 7470
and controls, muffler and heavy duty base.
Helpers platform
Hydraulic system
On the right side of the mast a helpers platform is mounted to
All drilling and associated functions are powered by an open simplify handling of drill pipes.

loop hydraulic system. Three pumps, two fixed gear pumps • This option adds appr. ............................................ 120 kg

and one variable volume piston pump, of heavy duty type Water / Foam injection pump

provide a long trouble free operation. All hydraulic circuits The water injection pump CAT1010 type has an incorpo-
rated pulse pump with independent supply lines for water
are protected by safety valves. and foam concentrate. The pump is driven by a hydraulic
• Fixed wing pump for rotation circuit........................................... gear type motor. Water is supplied from external supply.
...............................25VQTxxx12 max. flow 92 lit/min, 40 cm3/r Valves for operation of the pump and metering of mixture are
• Fixed wing pump for rapid feed and auxiliary functions circuit, mounted on the operators control panel.
................................ V20xxx11 max. flow 82 lit/min, 35,7 cm3/r A suction hose ¾”, 3m long, with foot valve for use of sepa-
• Variable piston pump for slow feed circuit.................................. rate tank or barrel is provided separately. A hose with quick
..................................................................... max. flow 25 lit/min coupling and nozzle for washing purpose is included.
•
• Rated volumes refer to 2300 rpm with separate diesel engine • Max flow ..................................................................... 45 lit/min
power pack. • Max pressure ..................................................................... 30 bar
• Rpm ....................................................................................... 900
Oil cooler • This option adds appr. ....................................................... 70 kg.

A heat exchanger package provides cooling for the hydraulic

oil system. The system is thermostatically controlled to main-

tain minimum operating temperatures.
• System design temp. ........................................................... 48ºC
• Cooling fan size ......................................................... Ø 538 mm
• Cooling fan speed .................................................... 2 200 r/min
• Fan drive ...................................................................... hydraulic

Hold back scale

The hold back gauge can is fitted with a scale ring. When the
drill string is balanced the scale is set and when drilling starts
(hold back pressure reduced) the correct bit load can be read
off the scale.

Fixed pipe rack

A fixed pipe rack mounts on right hand side of the rig. Can
hold up to 20 pcs of 114 mm (4 ½”) OD drill pipes.

Technical specifications Explorac R50 Crawler

Optional equipment

JIB boom, fixed exploration Saver sub

For handling drill pipe on angles up to 30 º from vertical. The To the rotation head is a floating sub flanged and the floating
fixed boom is manually pinned in position to suit the choosen sub has a 3 ½” reg box tool joint.
angle of drilling. This option requires the helpers platform as In order to minimize wear and tear of the floating sub it is
well as the winch kit for RC pipe handling. recommended to use a saver sub. In addition the saver sub
The winch is hydraulically driven and mounted on the boom. can function as a cross over sub to pin instead of box or
another type of thread.
• Operating angle: ..........................................................................
0 – 30 º , mast is manually locked in 5 º increments. • This option adds appr. .............................................. 10 kg
• Jib boom capacity ............................................................ 2,5 kN
• This option adds appr. ....................................................... 60 kg. Holding spanners

Alternative mast Holding keys, manually inserted, fitting into the break-out
table are available in a range of sizes to fit key slots on drill
The standard mast for 3 m drill pipe can be replaced by a pipes, DTH drills, subs, collars, stabilizers etc.
longer mast to accomodate 6m long drill pipe.
• This option adds appr. ...............................................10 kg each.
• Mast overall length ............................................................ 8,8 m
• Feed travel length ............................................................... 7,0 m Bit breaker plates
• Max distance between floating sub and B-O table.............. 6,8 m
• Drill pipe length ......................................................6,0 m (20 ft) Bit breaker plates are designed to fit in the break-out table to
• This option adds appr. ..................................................... 700 kg. keep drill bit from rotating or falling through when the tool
joint is loosened. Specify bit type, size and manufacturer. If
Cyclone not available, bit breaker plates can be supplied blank (bit
profile not cut into the plate) for final fitting in the field.
A cyclone is located at the right rear of the machine. Cy-
clone assembly reduces the velocity of the cuttings to allow • This option adds appr. .................................................7 kg each.
complete sample recovery. The cyclone can, if desired, be
delivered separatly free standing. An air operated cylinder Top head for RC Drilling
activates a door releasing the sample.
A standard Explorac R50 top head is adapted to a 4 ½”, 4”
• The assembly includes a 3” hose connecting the top head and or 3 ½” RC drilling system. Designed for using dual tube
the cyclone and a duct diverting hose reverse circulation air drilling method. The cuttings are
• Capacity ....................... 350 lit/sec (750 cfm), 3 ½”,4½” system conveyed to the surface through the top head and collected.
• This option adds appr. ..................................................... 300 kg. A special discharge swivel and top head shaft wear sleeve are
provided with this option. Side inlet swivel is not included in
Three tiers riffle splitter this item. Floating sub is not provided.

Used in conjunction with the cyclone, the splitter provides a • Head wear tube ID 40 mm ................................3 ½” RC system
method to reduce the volume of the collected material, while • 50 mm ..................................................................................... 4”
maintaining a representative sample. • 50 mm ................................................................................. 4 ½”
• This option adds appr. ..................................................... 120 kg.
• This option adds appr. ....................................................... 90 kg.

Break out table inserts Side inlet swivel (less sub)

There are two sizes of inserts, 203 mm and 150 mm standard Introduces the flushing air into the dual pipe annulus and
delivered with the rig. To guide selected drill pipes inserts
are available for 114 mm, 100 mm, 89 mm and 76 mm. Other ports the sample cuttings through the top head for collection.
sizes are available on request.
Includes installation to the top head, but not sub for the drill
• This option adds appr. .................................................30 kg/ set.
pipe.

Model 3 ½” 4” 4 ½”

Upper thread: 3 ½” RC 4” RC Metzke 4” RC Metzke

Metzke box box long box

Lower thread: 3 ½” RC 4” RC Metzke 4 ½” RC
Metzke pin
short pin Metzke pin

Side port: 1 ½” BSP 2 ½” NPT 2 ½” NPT

I.D. of shaft: 62,3 mm 68,6 mm 68,6 mm

• This option adds appr. ........................................................ 30 kg

Technical specification Explorac R50 Crawler

Technical specifications Explorac R50 Crawler

Dimensions Measurements & weights

Drill rig
Carrier
Total:

Crawler version (kg) 3510
7 010*
2 790
9 800

6580 2550 2510
4000
* Ready to drill RC application
Atlas Copco Geotechnical Drilling and Exploration
www.atlascopco.com 2480

6991 5021 01 Märsta,Sweden, 14 June 2009 © Copyright 20XX, Atlas Copco Craelius AB, Märsta Sweden. Any unauthorized use or copying of the contents or any part thereof is prohibited. This applies in
particular to trademarks, model denominations, part numbers and drawings. Illustrations and photos in this document may show equipment with optional extras.
Specifications and equipment subjects to change without notice. Consult your Atlas Copco Customer Center for specific information.